no NodeXL ribbon

After downloading and installing NodeXL_1.0.1.196, I opened the template and am not able to find the NodeXL ribbon in excel. Upon opening the excel template, I get the following error after starting up:

"Uncaught.exception thrown by method called Reflection. (Exception from HRESULT: 0x80131604)".

I am not sure if this makes a difference but I am using Excel 2010. I am runnning it on windows XP via VMWare Fusion. Any help would be greatly appreciated.

You have something called ".NET Programmability Support" disabled in Excel. It is normally enabled when Office is installed, but if it gets turned off for some reason, NodeXL (which is a .NET program) won't be able to run. Enabling .NET
Programmability Support will fix the problem.